I think people are misguided by wrong perception that players are "rude" to continue playing a very bad position and that it is quite "respectful" to resign (no matter what the position is).
The truth is, you're probably not a professional player, and you cannot be a strong player with that kind of mentality. Every players are mentally under pressure when they have to defend a difficult position (or even equal but sharp position). The disability to cope with this pressure is always part of the reason to resign.
Yes, you can resign if you don't want to waste energy that you will need for the next game, not because giving up the pressure, or want to look polite.
Look at team matches OTB. They fight harder because they feel responsible for the other team members. Even if it is not team match, you still have responsibility for yourself, your family, for time and money that you spend to join the tournament. Isn't a responsible person respectful?
Recently (my last completed game) I played a King's Gambit. It is difficult to play this opening as it requires strong calculation skill. While playing this opening, most of the time I found a combination chance. The chance sometimes will slip away if not taken right away. I always ask to myself, if I don't do it know, will I be able to add more pressure or will he improve his position? If I see that he can improve his position, then I will take the risk. If my calculation and intuition is superior then I'll win, if not then I'll loose.
In this game I calculated the details of the combination, but still uncertain if I will succeed. But at minimum I can see that at the end of my vision I still hold the initiative, or it is still unclear. The check against my King at the first and second rank is the one that I can't see clearly enough. But to my surprise, my opponent resigned. If he were using engine to analyze the position, may be he would think "Oh, my position is -2.04, may be I need to resign." But if he's not (which I believe so), is it because he can see the end of the combination better than I do? If he thinks he is certainly loosing, why not let me prove it? I did the combination not because I'm certain with my calculation but because that is how to play the KG (otherwise why should I play a "refuted" opening?).
Here is the game (combination is on move #13):
There is no way to do it in OTB game of course. What I did couple of times in correspondence chess - in completely won position while taking yet another of his pieces I would send him a comment: "Chess is fun, isn't it?". To my surprise it worked!
I don't know how it worked for you but from all the many cc games I've played(and still play whatever the site)I am now very careful with the chat...unless you play with a friend.I like to chat,even with my approximate english but I've found that,generally,from my point of view,many players take the game way too seriously(hey most of us are here for(serious)fun.
I've had few bad experiences but now I play my games,and that's it that's all.If they want to chat ok no problem but I won't make the first move anymore.
Humour and chess is a (very) bad mix.
Silence is golden?